Double-piston gas-engine



J. M.,JOHNSON.

DOUBLE PlsToN GAS'ENGINE.

APPLICATIN FILED Nov. 9. 191s.

Patented Feb. 3, 1920.

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1. M. JOHNSON. DoUBLE PlsToN GAS ENGINE.l

APeucATloN man Nov. 9. l'sr'l Patented Feb. 3, 1920.

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I. M. JOHNSON.

DOUBLE PISTON GAS ENGINE.

APPLICATION FILED NOV. 9.1-918.

Patented Feb. 3,1920.

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JOHN MELVIN JOHNSON, F GALVA, KANSAS.

DOUBLE-PISTON GAS-ENGINE.

Specification of Letters Patent.

Application filed November 9, 1918. SerialNo. 261,804.

` To all whom 'it may concern:

Be it known that I, JOHN MELUN JOHN- soN, a citizen of the United States, residing at Galva, in the county of McPherson and State of Kansas, have invented new and useful Improvements in Double-Piston Gas- Engines, of which the following is a specification.

The present invention comprehends generally improvements in that class of inventions known as internal combustion engines and more particularly has reference to a double piston gas engine.

The invention, 4as its primary object, aims to provide an engine of the above mentioned character wherein there is employed two simultaneously movable pistons in a single cylinder while acting in conjunction and in timed relation with these parts is a rocking sleeve valve for controlling the admission and exhausting of gas to and from the,

cylinder thus providing an engine wherein maximum power and eilicienc is obtained with the employment of a minimum amount of fuel. A

As an equally important object the present invention contemplates the provision of a device of the above mentioned character wherein a sleeve valve is mounted for rocking movement medially of the ends of the' cylinder for controlling he admission and exhausting of gases to and from the cylinder while mounted on the powei' shaft and acting in conjunction with the sleeve valve is a cam of improved construction for insuring of the actuation of the sleeve valve in timed relation with respect to the simultaneously removable pistons.

Among the other aims and objects of this invention may be recited the provision of a device of the character described with a view to compactness, and in which the parts are few, the construction simple, the cost of production low and the eciency high.

Other improvements and novel details in the construction and arrangement of the various parts of the apparatus will be brought out more in detail in the'description to follow, which for a clear understanding of the invention should be considered in connection with the accompanying drawings forming a part hereof, and wherein is disclosed for the purpose of illustration a convenient and-satisfactory embodiment of the invention. It is to be noted in this connection that minor changes in the construction and arrangementof parts may be made without der parting from the the various parts.

The invention is clearly illustrated in the accompanying drawings, in which:

Figure l i-s a` side elevation of the improved engine.

Fig. 2 is a top plan view thereof.

Fig. 3 is a longitudinal central sectional view of the invention.

Fig. 4 is a transverse section taken on line 4-4 of Fig. 2.

Fig. 5 is a transverse sectional view of the same part shown in another position.

principle of operation of Fig. 6 is a perspective detail of the sleeve valve.

Fig. 7 is a plan diagram of the cam. Similar characters of reference are employed in all of the above described views,

to indicate corresponding parts.

Referring now, more particularly, tothe accompanying drawings there is provided a singlecylinder 1 supported by suitable legs 2 which arein turn secured to the floor by the fasteners 3. Extending from diametrically opposite points and from the respective ends of the cylinder 1 are spaced parallel arms 4 which terminate-in bearings 5 in which bearings are journaled shafts 6 formed in turn with crank portions 7 positioned between the arms 4. Pistons 8 and 9 are slidably mountedin-t-he cylinder Aand are disposed to face each other while operatively connected to the piston heads are rods 10 the outer ends of which are looped as at 11 and Iare arranged in engagement with the crank portions 7 of the shafts 6.

These shafts 6 are further supported in verv tica'l bearing standards 12.

A power shaft'13 is now employed and is journaled in bearing standards 14 which are connected to the floor as at 15. A relatively large gear wheel 16 is mounted on the power shaft and meshes with other lar gear wheels 17 in turn carried by the adja- Patelited Feb. 3, 1920.

posite the split is an arcuate bar 20 from is also formed medially of the ends of the groove with the slot 23 in which operates the lug 21. On opposite sides. of the sleeve val\'e the inner bore is provided with annular grooves 24 in which are iitted guide rings 26. The sleeve valve is further provided with diametrically opposed inlet openings 27 and diametrically opposed exhaust openings 29 which, on rocking movement of the sleeve valve, are adapted to respectively and alternately aline or register with the branch pipes 28 of the inlet manifold and with the branch pipes 30 of the exhaust manifold 31. In insuring4 of the sleeve valve 19 being rocked in timed relation with respect to the actuation of the simultaneously movable piston heads 8 and 9 a cam wheel 32 is rigidly connected to onel end of the supplemental shaft 30 which is journaled in the bearing standard 31 and carries on its-inner end a gear 32 which meshes with a cog wheel 33 carried on the adjacent end of the power shaft and by this arrangement it is to be appreciated that the intermeshing gears serve as a means for transmitting moticn at theproper rate'of speed from the shaft 13 to the shaft 30. A wheel 32 is osi'tioned directly above the center of the cy inder and formed in its periphery with a sinuous groove 33 lclearly illustrated in Fig. 7. By referring to this figure it. is'to be appreciated that the groove 33 has one half of its circumference straight as indicated .by the numeral 34 while the other half is zigzag as at 35 and 3G in opposite directions. By this arrangement it is to be appreciated that during rotation of the power shaft 13 the cam wheel -will be rotated and inasmuch as the lug 21 operates in the groove 33 the sleeve valve will be shifted. For instance, assuming that the lug is moved to one side by its engagement with the zigzagged portion 36 of the groove then the exhaust openings 27 will be registered with the branc pipes 30 of the exhaust and simultaneous .with this action the pistons 8 and 9 assume a sliding movement toward each other on their exhaust stroke for the forcing of the burnt gases gases which arel drawn thereinto on the intake stroke of the pistons as they move away from each other toward the outer ends of the cylinder. Immediately after this arrangement of parts the lug is engaged by the straight portion 3l of the groove and is kept from rocking movement during the compression and tiring strokes of the piston heads 8 and 9 and immediately after the firing stroke the exhaust stroke occurs as above set forth and this cycle of operationis repeated.) It is to be appreciated, of course, that a spark plug 37 is employed for the firing of the gases at the proper time.

It is believed 4in view of the foregoing description that a further detailed description of the operation of the invention is entirely unnecessary. Likewise it is believed that the advantages of the invention will be readily apparent. As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limited sense. It is also to be understood that the 'language used in the following claims is intended to cover all the generic and specific features of the invention herein described and all statements of the scope of the invention which as a matter of language might be said to fall. therebetween.

What is claimed is:

1. An engine of the character described including a cylinder, pistons operating therein, a power shaft, transmission'mechanism between the pistons and power shaft, a sleeve ,valve rockably mounted medially the endsV of the cylinder, a lu projecting from the sleeve valve, a rotata ly mounted cam operably connected to the and provided in its outer perip ery with a sinu-ous groove in which is engaged the lug to insure of the rocking of the sleeve Valve in timed relation with the actuation of the pistons.

2. An engine of the character described including a cylinder, inlet and exhaust pipes communicating therewith, piston heads o crating in the cylinder, a power shatpt, transmission means operably mounted between the piston heads and the power shaft for transmitting motion thereto, a sleeve valve rockably mounted in the cylinder medially of the ends thereof and provided with inlet and exhaust openings'vfor registration at times with the inlet and exhaust pipes, a lug carried by the sleeve and projecting exteriorly of the cylinder, a suppleower `shaft I and having a sinuous groove in itsl outer periphery for engagement. aboutI the lug for rocking the sleeve valve in timed relation with the actuation of the pistons.

3. An engine of the character described including a cylinder, inlet and exhaust )ipes communicating therewith at points me( ially of the ends thereof, pistons operating in the cylinder, rotatably mounted crank shafts, piston rods operably arranged b/etween the piston and the crank sliafts,a rotatably mounted power shaft, a gear on the power shaft, gears carried b v the crank shaft and meshingr with the power shaft for assuring of the simultaneous actuation of the pistons and for the transmission of movement to the power l shaft, a sleeve valve rockably mounted in the cylinder medially of the ends thereof, means for guiding the rocking movement of the valve, a lug carried by the valve and projecting through the cylinder, the valve being provided with inlet and exhaust openings for registration at times with the inlet and exhaust pipes, a rotatably mounted supplemental shaft, transmission means between the supplemental shaft and the power shaft. a cam wheel carried by the supplemental shaft and positioned above the cylinder and having a sinuous groove in its outer periphery for engagement about the lug for assuring of the rocking of the valve in timed relation with respect to the operation of the pistons for controlling the admission and the exhaustin of gases.

In testimony whereof I a x m signature.

J. MELVIN J0 kNSON. 

